- C3 Advisors
- Cadence Hospice
- Cain Brothers
- Cake
- Cake Ventures
- Caldwell Hospice & Palliative Care
- Caldwell Hospice and Palliative Care
- California Black Health Network
- California Department of Aging
- California Department of Corrections & Rehabilitation
- California Health Care Foundation
- California Health Report
- California Hospice and Palliative Care Association
- California Hospice Network
- California Pacific Medical Center
- California State University Shelley Institute for Palliative Care
- Call9
- Calvary Hospice
- Calvary Hospital
- Calvert Home Health